$navHeight: 44px;
*{padding: 0;margin: 0;}
.navbar {
	height: $navHeight;
	width: 100%;
	position: fixed;
	top: 0;
	display: flex;
	justify-content: space-between;
	padding: 0 22px;
	box-sizing: border-box;
	user-select: none;
	color: #fff;
	border-bottom: 1px solid rgba(255, 255, 255, 0.3);
	z-index: 2;
	background-color: transparent;
    transition: none;

	.logo {
		cursor: pointer;
		// min-width: 100px;
		font-weight: 600;
		font-size: 18px;
		text-decoration: none;
		color: inherit;
	    z-index: 2;
	}
	.navbar_nav {
		display: flex;
		gap: 20px;
		align-items: center;
		list-style: none;
		margin: 0;
		padding: 0;

		.nav_item {
			cursor: pointer;
			font-size: 14px;
			font-weight: 400;
			padding: 0 15px;
			height: 100%;
			line-height: $navHeight;
            z-index: 2;
		}
        .nav_item_popup {
            position: absolute;
            top: 0; //$navHeight
            left: 0;
            right: 0;
            height: 688px;
            // transform: translateY(-100%);
            // animation-name: reverseFadeInDown;   //reverseFadeInDown
            animation-duration: .5s;
            z-index: 1;
            transition:height 0.3s cubic-bezier(0.4, 0, 0.6, 1) 80ms, visibility 0.3s cubic-bezier(0.4, 0, 0.6, 1) 80ms,background-color 0.3s cubic-bezier(.4,0,.6,1) 80ms;

            display: flex;
            flex-direction: column;
            // transition: all 0.25s ease-in-out;

            .border_top{
                display: inline-block;
                width: 100%;
                height: $navHeight;
                border-bottom: 1px solid rgba(140, 140, 140, 0.3);
            }

            a {color: inherit;text-decoration: none;}

            .nav_item_popup_content{
                flex: 1;
                display: flex;
                padding: 0 22px 4px 22px;;
                max-height: calc(688px - $navHeight);
                .classify{
                    flex: 1;
                    max-width: 200px;
                    border-right: 1px solid rgba(140, 140, 140, 0.3);
                    margin-right: 20px;
                    padding-top: 22px;
                    box-sizing: border-box;
                    &:last-child{border-right: none; margin-right:0;}
                    
                    .classify_title{
                        font-size: 16px;
                        font-weight: 500;
                        margin-bottom: 30px;
                    }
                    ul{
                        list-style: none;
                        font-size: 14px;
                        .link_item{
                            display: inline-block;
                            padding: 15px 11px;
                            padding-left: 0;
                            margin-bottom: -6px;
                            width: 100%;
                            text-decoration: none;
                            outline-offset: -7px;
                            box-sizing: border-box;

                            span{
                                display: inline-block;
                                position: relative;
                                & > .after{
                                    display: inline-block;
                                    position: absolute;
                                    bottom: -5px;
                                    left: 0;
                                    height: 1px;
                                    width: 0;
                                    transition: .5s;
                                }
                            }
                            &:hover span .after{
                                width: 100%;
                            }
                        }
                    }
                }
                .classify_show_more{
                    flex: 2;
                    padding-top: 22px;
                    overflow-y: auto;
                    .describe_title{
                        font-size: 16px;
                        font-weight: 500;
                        margin-bottom: 30px;
                    }
                    .describe_img{
                        img{
                            width: 100%;
                        }
                        border-radius: 5px;
                        margin-bottom: 10px;
                    }
                    .describe_content{
                        text-align: justify;
                        font-size: 14px;
                        line-height: 26px;
                    }
                }
            }
        }

        .nav_item_popup_hide {
            height: 0;
            display: none;
        }
	}
}


@keyframes fadeInDown {
	from {
        height: 0;
	}
	to {
        height: 688px;
    }
}
@keyframes reverseFadeInDown {
	0% {
        height: 688px;
	}
	100% {
        height: 0;
	}
}


/*
 * 媒体查询
*/
@media screen and (max-width: 1200px) {
	//导航
}
@media screen and (max-width: 992px) {
}
@media screen and (max-width: 640px) {
	.navbar .navbar_nav {
		// display: none;   //后面写手机端放开
	}
}
@media screen and (max-width: 300px) {
}
